.nav{
    background-repeat: no-repeat;
    background-size: cover;
    background-position: left !important;
    position: relative;
}
.n1{
    background-image: url('https://tpc666666.oss-cn-shanghai.aliyuncs.com/logo_title.png');
}
.n2 {
    background-image: url('https://tpc666666.oss-cn-shanghai.aliyuncs.com/fenlei.png');
    position: relative;
}
.fen_input{
    width: 300rpx;
    height: 45rpx;
    line-height: 45rpx;
    background-color: white;
    border: 1px solid gainsboro;
    color:gray ;
    position: absolute;
    left: 190rpx;
    border-radius: 25px;
    padding-left: 20px;
}
.back_icon{
    width: 40rpx;
    height: 40rpx;
    position: absolute;
    left: 5rpx;
}
.search_logo ,.collect_logo{
    background-image:url('https://tpc666666.oss-cn-shanghai.aliyuncs.com/search_logo.png');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 130rpx;
    margin-left: 220rpx;
    width: 720rpx;
    margin-top: -5rpx;
}
.center_title {
    display: block;
    text-align: center;
    font-size: 40px;
    font-weight: 600;
}
.collect_logo{
    background-image:url('https://tpc666666.oss-cn-shanghai.aliyuncs.com/my_collect.png');
    background-position: left;
}
.n6 {
    background-image:url('https://tpc666666.oss-cn-shanghai.aliyuncs.com/mycenter.png');
    background-position: left;
    background-color: #FD6226;
}

